#screen {
    width: 450px;
    height: 50px;
    margin-top: 10px;
    background-color: #fff;
    font-size: 22px;
    line-height: 50px;
    text-align: center;
}
#chat_area {
    width: 404px;
    height: 400px;
    margin-top: 10px;
    margin-left: 150px;
    border: 2px solid #fff; border-radius: 5px;
    position: relative;
    background-color: #fff;
}
#chat_show {
    width: 400px;
    height: 300px; overflow-y: scroll;
    background-color: #fec;
    font-size: 22px;
    line-height: 50px;
    text-align: center;
}
#chat_input {
    width: 300px;
    height: 50px;
    margin-top: 30px;
    background-color: #fff;
    font-size: 30px;
    border: 2px solid #fec; border-radius: 5px;
    vertical-align: top;
}
#chat_button {
    width: 90px;
    height: 50px;
    margin-top: 30px;
    background-color: #fec;
    font-size: 15px;
    border: 2px solid #fec; border-radius: 5px;
    vertical-align: top;
}
#chat_button:hover {
    width: 90px;
    height: 50px;
    margin-top: 30px;
    background-color: rgb(201, 145, 32);
    font-size: 15px;
    border: 2px solid #fec; border-radius: 5px;
    vertical-align: top;
}
#chat_button:active {
    width: 90px;
    height: 50px;
    margin-top: 30px;
    background-color: rgb(149, 127, 83);
    font-size: 15px;
    border: 2px solid #fec; border-radius: 5px;
    vertical-align: top;
}

#self_msg {
    height: 35px;
    line-height: 35px;
    font-size: 15px;
    float: right;
    background-color: rgb(7, 190, 102);
    border-radius: 5px;
}
#peer_msg {
    height: 35px;
    line-height: 35px;
    font-size: 15px;
    float: left;
    background-color: rgb(93, 218, 243);
    border-radius: 5px;
}

/* 返回大厅按钮样式 */
.return-btn {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 30px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white !important;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    text-align: center;
    text-decoration: none;
    display: inline-block;
    z-index: 100;
}

/* 悬停效果 */
.return-btn:hover {
    transform: translateX(-50%) scale(1.05);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

/* 点击动画 */
.return-btn:active {
    transform: translateX(-50%) scale(0.95);
}

/* 胜利/失败时的按钮变体 */
.return-btn.victory {
    background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%);
}
.return-btn.defeat {
    background: linear-gradient(135deg, #ff416c 0%, #ff4b2b 100%);
}